This 1% Public Use Microdata Sample Equivalency (PUMEQ1) file is intended to help users understand the relationships
between standard Census 2000 geographic concepts (counties, county subdivisions, places, and census tracts) and the
SuperPUMA geographic units of the 1% PUMS data files.
Each PUMEQ1 file delineates the summary level codes specific to the PUMS geography, and has its own set of summary
level code and hierarchical sequencing, as described below:
790 State-SuperPUMA
791 State-SuperPUMA-County (or part)
792 State-SuperPUMA-County-County Subdivision (or part) (20 states with functioning county subdivisions)
793 State-SuperPUMA-County-County Subdivision-Place/Remainder (or part)
794 State-SuperPUMA-County-County Subdivision-Place/Remainder-Census Tract
Please note that in the New England states, there may be more than one summary level 791 record within a single
SuperPUMA, since these areas may exist in more than one metropolitan area/nonmetropolitan area. Please also
note that county subdivision codes are not used in the 30 states, the District of Columbia, and Puerto Rico,
that have no functioning county subdivisions. Census tracts are shown only when a place has parts in more than
one SuperPUMA.
The fields and content of the PUMEQ1 file is described below:
FIELD DESCRIPTION
A Summary Level Code (described above)
B FIPS State Code
C SuperPUMA Code
D Reserved for future use
E FIPS County Code
F FIPS County Subdivision Code
G FIPS Place Code
H Central City Indicator:
0 = Not in central city
1 = In central city
I Census Tract Code
J Metropolitan Statistical Area/Consolidated Statistical Area Code
K Primary Metropolitan Statistical Area Code
L Census 2000 100% Population Count
M Area Name
A B C D E F G H I J K L M
790 11 11100 572059 SuperPUMA 11100
791 11 11100 001 8872 8840 572059 District of Columbia
793 11 11100 001 50000 1 8872 8840 572059 Washington city